CN211473510U

CN211473510U - Ancient building wall body repair support

Info

Publication number: CN211473510U
Application number: CN201922050386.8U
Authority: CN
Inventors: 李朝阳; 王恒; 王中原
Original assignee: Beijing Renjiu Construction Engineering Co ltd
Current assignee: Beijing Renjiu Construction Engineering Co ltd
Priority date: 2019-11-23
Filing date: 2019-11-23
Publication date: 2020-09-11
Anticipated expiration: 2029-11-23

Abstract

The utility model relates to an ancient building wall body restores support, it includes base and backup pad, be provided with flexible subassembly between base and backup pad, flexible subassembly includes telescopic link and auxiliary rod, the telescopic link includes first telescopic link and second telescopic link, first telescopic link is located base length direction's both ends respectively with the second telescopic link, the auxiliary rod is in same one side of base length direction with the second telescopic link, the bottom and the base fixed connection of first telescopic link, first telescopic link top is articulated fixed with the backup pad, second telescopic link and auxiliary rod bottom all with base sliding connection, be fixed with the slide rail with second telescopic link bottom and the relative position in auxiliary rod bottom on the base, second telescopic link and auxiliary rod bottom rotate respectively and are connected with the slider, the second telescopic link all is articulated fixed with the backup pad with the auxiliary rod top. The utility model discloses have and to adapt to as required and wait to restore the different gradients in roof to closely laminate the effect of realizing the support to the roof with the roof.

Description

Ancient building wall body repair support

Technical Field

The utility model belongs to the technical field of ancient building prosthetic technique and specifically relates to a ancient building wall body restores support is related to.

Background

Ancient buildings are important components in historical relics in China, the protection and repair of the ancient buildings are one of important tasks in the relic protection work, and the repair and protection of the ancient buildings adopt different repair modes due to different factors such as the historical value, the historical status, the building quality, the damage degree, the human historical environment and the like of the protected buildings. In the repair process of ancient building, the crack repair is a common repair condition, because need carry out operations such as the clearance of fissured slip casting or excessive damage position and punch to positions such as the wall body of ancient building, makes the structure of the ancient building that originally just receives the damage receive the influence very easily, consequently needs treat the wall body of the ancient building of restoreing and support.

However, when some ancient buildings are seriously damaged and cannot be corrected, bricks of the original wall need to be removed, but the stability of the building is easily reduced by directly removing the wall. Need support ancient building wall body through repairing the support, especially to the restoration of ancient building wall body roof, because need support the roof among the repair process, current repair support is through rising to roof top and roof butt with the flat board to the realization is to the support of roof. But because the shape of ancient building is various, many ancient building roofs are not the horizontality, and some have all various angle slopes, can not satisfy the variety of ancient building roof shape to current restoration support, and the operation is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an ancient building wall body restores support, it has can adapt to as required and treats the different gradients of restoreing the roof to closely laminate the effect of realizing the support to the roof with the roof.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a ancient building wall repairing support comprises a rectangular base and a supporting plate, wherein the base is horizontally arranged, a telescopic assembly is arranged between the base and the supporting plate, universal wheels are fixedly connected at four right-angled positions on the lower surface of the base, the telescopic assembly comprises a telescopic rod and an auxiliary rod, the telescopic rod comprises a first telescopic rod and a second telescopic rod, the first telescopic rod and the second telescopic rod are respectively positioned at two ends of the base in the length direction, the auxiliary rod and the second telescopic rod are positioned at the same side of the base in the length direction, the bottom end of the first telescopic rod is fixedly connected with the base, the top end of the first telescopic rod is fixedly hinged with the supporting plate, the bottom ends of the second telescopic rod and the auxiliary rod are both in sliding connection with the base, slide rails are fixed at the bottom ends of the second telescopic rods and at positions opposite to the bottom ends of the auxiliary rods on the base, the length direction of the, thereby be convenient for drive second telescopic link and auxiliary rod through the slider and slide along the slide rail that corresponds, second telescopic link and auxiliary rod top all with backup pad lower surface hinge fixed.

Through adopting above-mentioned technical scheme, it is articulated fixed with first telescopic link through backup pad one end, the extension of adjustment second telescopic link, the cooperation is with the one end of the articulated fixed backup pad in first telescopic link top, make the one end with the articulated backup pad in second telescopic link top rise, simultaneously along with the rising of backup pad and the articulated one end of second telescopic link, the auxiliary rod that drives and the articulated fixed of backup pad extends along with the backup pad risees, along with the extension of second telescopic link and auxiliary rod with the one end top height of articulated backup pad, make the length direction of second telescopic link and auxiliary rod along the slide rail slide, thereby be convenient for adjust the backup pad into inclination that needs in order to adapt to different area restoration roofs.

The utility model discloses further set up to: the first telescopic rod and the second telescopic rod respectively comprise a pipe sleeve and an ejector rod, the pipe sleeve is vertically arranged, the bottom end of the pipe sleeve is fixedly connected with the base, a hydraulic cylinder is arranged in the pipe sleeve, the bottom end of the hydraulic cylinder is fixed with the base, the top end of a hydraulic rod of the hydraulic cylinder is fixedly connected with the ejector rod, the ejector rod is vertically arranged, the top end of the ejector rod is hinged and fixed with the bottom end of the supporting plate, the diameter of the ejector rod is smaller than the inner diameter of the pipe sleeve, and when the hydraulic rod extends out of the.

Through adopting above-mentioned technical scheme, through the setting of pipe box and ejector pin and the pneumatic cylinder of setting in the pipe box to be convenient for adjust the length of telescopic link as required, in order to adapt to different demands.

The utility model discloses further set up to: the auxiliary rod comprises an auxiliary pipe and an auxiliary supporting rod, the auxiliary pipe is vertically arranged, the bottom end of the auxiliary pipe is connected with the base in a sliding mode, the top end of the auxiliary pipe is open, the auxiliary pipe is connected with the auxiliary supporting rod in a sliding mode, the top end of the auxiliary supporting rod is hinged and fixed with the supporting plate, and a locking part is arranged on the auxiliary rod.

Through adopting above-mentioned technical scheme, through the cooperation setting of auxiliary tube with auxiliary strut to it is flexible to be convenient for make the second telescopic link drive auxiliary rod.

The utility model discloses further set up to: the connecting line between first telescopic link, second telescopic link and the auxiliary rod encloses and establishes into an isosceles triangle, and the distance between first telescopic link and the second telescopic link equals with the distance between second telescopic link and the auxiliary rod.

Through adopting above-mentioned technical scheme, enclose into an isosceles triangle through the line between first telescopic link, second telescopic link and the auxiliary rod to be convenient for support the backup pad is firm.

The utility model discloses further set up to: the first telescopic rod and the second telescopic rod are respectively located at two ends of the base in the length direction, the first telescopic rod and the second telescopic rod are both located on a central axis of the base in the width direction, and auxiliary rods in sliding connection with the base are respectively arranged on two sides of the second telescopic rod by taking the central axis of the base in the width direction as a symmetry axis.

Through adopting above-mentioned technical scheme, be in with base width direction's axis through first telescopic link and second telescopic link on, the auxiliary rod is located the both sides of second telescopic link to be convenient for more firm support plate.

The utility model discloses further set up to: the sliding part is a pulley.

Through adopting above-mentioned technical scheme, through the setting of pulley, be convenient for make the second telescopic link can slide and the crooked problem can not appear when extension is with backup pad one end jack-up at the flexible in-process of second telescopic link.

The utility model discloses further set up to: a pulling piece is arranged between one end of the sliding rail, facing the first telescopic rod, and the opposite second telescopic rod, and the two ends of the pulling piece in the length direction are fixedly connected with the position, opposite to the sliding rail, of the sliding rail and the side wall, opposite to the pipe sleeve of the second telescopic rod, of the sliding rail respectively.

Through adopting above-mentioned technical scheme, through the setting of pulling the piece, be convenient for increase the pulling at the second telescopic link slip in-process for the second telescopic link slides more in a flexible way.

The utility model discloses further set up to: the pulling piece comprises a tension spring, two ends of the tension spring in the length direction are fixedly connected with fixing hooks respectively, fixing rings are fixedly connected to the positions, opposite to the slide rail, of the fixing hooks and the side wall, opposite to the pipe sleeve of the second telescopic rod, of the fixing hooks, and the fixing hooks are hooked on the fixing rings.

Through adopting above-mentioned technical scheme, through the setting of extension spring for be convenient for spur the second telescopic link fast through the extension spring, cooperate the fixed hook that extension spring length direction both ends set up and set up on the slide rail and the solid fixed ring on the second telescopic link, thereby realize tearing open in a flexible way and trade the extension spring.

The utility model discloses further set up to: four right-angled position fixed connection stabilizer blades of under base surface, stabilizer blade include pillar and thread bush, the vertical setting of thread bush, thread bush top and under base surface fixed connection, the thread bush bottom is the opening, set up the internal thread in the thread bush, pillar and thread bush threaded connection, the vertical setting of pillar, the one end that the base was kept away from to the pillar is the tip.

Through adopting above-mentioned technical scheme, through the setting of stabilizer blade, be fixed in the assigned position with the base fast through the stabilizer blade, prevent that the universal wheel from driving the base and slide at will, thereby the pillar sets up with the cooperation of thread bush, moves the length of pillar nimble regulation stabilizer blade through twisting.

The utility model discloses further set up to: the locking piece comprises a bolt, and the bolt penetrates through the side wall of the auxiliary pipe and abuts against the side wall of the auxiliary supporting rod.

Through adopting above-mentioned technical scheme, through the setting of retaining member to it is fixed with supplementary branch to manage with the assistance-assist.

To sum up, the utility model discloses a beneficial technological effect does:

1. the first telescopic rod, the second telescopic rod and the auxiliary rod are matched, so that the inclination of the supporting plate can be flexibly adjusted, the inclination angle of the roof to be repaired can be flexibly adapted, and the stable support of the roof to be repaired can be realized;

2. through the setting of stabilizer blade, the realization is fixed firm to ancient building wall body restoration support.

Drawings

FIG. 1 is a schematic structural diagram of a repair bracket for a wall of an ancient building according to example 1;

FIG. 2 is a schematic view of the structure of a supporting foot of embodiment 1;

fig. 3 is a sectional view of the first telescopic link and the second telescopic link of embodiment 1;

FIG. 4 is a schematic structural view of an auxiliary lever of embodiment 1;

FIG. 5 is a schematic structural view of a pulling member of embodiment 1;

fig. 6 is a schematic structural diagram of the historic building wall repair support of embodiment 2.

In the figure, 1, a base; 11. a universal wheel; 12. a support leg; 121. a pillar; 122. a threaded sleeve; 123. an adjusting ring; 1231. anti-skid lines; 2. a support plate; 3. a telescoping assembly; 31. a telescopic rod; 311. a first telescopic rod; 3111. pipe sleeve; 3112. a top rod; 3113. a hydraulic cylinder; 312. a second telescopic rod; 3121. a fixing ring; 32. an auxiliary lever; 321. an auxiliary tube; 322. an auxiliary strut; 323. a bolt; 33. a pulley; 4. a slide rail; 5. a pulling member; 51. a tension spring; 52. and (5) fixing the hook.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1:

referring to fig. 1, for the utility model discloses an ancient building wall body restores support, including rectangular base 1 and backup pad 2, base 1 level sets up, is provided with flexible subassembly 3 between base 1 and backup pad 2, supports backup pad 2 in a flexible way through flexible subassembly 3. The universal wheels 11 are fixedly connected to the four right-angled positions of the lower surface of the base 1, the supporting legs 12 are arranged beside each universal wheel 11, the base 1 is rapidly fixed at a designated position through the supporting legs 12, and the universal wheels 11 are prevented from driving the base 1 to slide randomly.

Referring to fig. 1 and 2, the supporting leg 12 includes a supporting column 121 and a threaded sleeve 122, the threaded sleeve 122 is vertically disposed, the top end of the threaded sleeve 122 is fixedly connected with the lower surface of the base 1, the bottom end of the threaded sleeve 122 is an opening, an internal thread is disposed in the threaded sleeve 122, and the supporting column 121 is in threaded connection with the threaded sleeve 122. The supporting column 121 is vertically arranged, and one end of the supporting column 121 far away from the base 1 is pointed. The adjusting ring 123 is sleeved on the supporting column 121 and fixed with the supporting column 121, and the outer side of the adjusting ring 123 is provided with anti-slip threads 1231, so that the supporting column 121 can be conveniently screwed. When needing base 1 to slide, the length of adjustment pillar 121 is less than the distance between 11 bottoms of universal wheel and the base 1 lower surface, when needs are firm fixed with base 1, twists adjustable ring 123 for the distance between pillar 121 bottom and the base 1 is greater than the distance between 11 bottoms of universal wheel and the base 1 lower surface, thereby is convenient for stabilize support base 1.

The telescopic assembly 3 comprises a telescopic rod 31 and an auxiliary rod 32. The telescopic rod 31 comprises a first telescopic rod 311 and a second telescopic rod 312, the first telescopic rod 311 and the second telescopic rod 312 are respectively located at two ends of the base 1 in the length direction, and the auxiliary rod 32 and the second telescopic rod 312 are located at the same side of the base 1 in the length direction. The connecting line between the first telescopic rod 311, the second telescopic rod 312 and the auxiliary rod 32 is enclosed to form an isosceles triangle. The distance between the first telescopic rod 311 and the second telescopic rod 312 is equal to the distance between the second telescopic rod 312 and the auxiliary rod 32. The first telescopic rod 311 is located at the midpoint of the base 1 in the width direction, so that the supporting force is more stable.

The bottom end of the first telescopic rod 311 is fixedly connected with the base 1, and the top end of the first telescopic rod 311 is hinged and fixed with the support plate 2. The bottom ends of the second telescopic rods 312 and the auxiliary rods 32 are both connected with the base 1 in a sliding mode, and the top ends of the second telescopic rods 312 and the auxiliary rods 32 are both hinged and fixed to the lower surface of the supporting plate 2. Fixed with slide rail 4 with second telescopic link 312 bottom and the relative position in auxiliary rod 32 bottom on base 1, the length direction of slide rail 4 sets up along base 1's length direction, slide rail 4 one end flushes with the base 1 edge, slide rail 4 length direction's the other end extends to base 1 length direction's mid point position along base 1 length direction and the orientation that is close to first telescopic link 311, thereby the restriction is close to the gliding nearest position of first telescopic link 311 along slide rail 4 gliding second telescopic link 312 and auxiliary rod 32 orientation, realize the telescopic link to the firm support of backup pad 2.

The bottom ends of the second telescopic rod 312 and the auxiliary rod 32 are respectively rotatably connected with a pulley 33, and the pulley 33 is convenient for driving the second telescopic rod 312 and the auxiliary rod 32 to slide along the corresponding slide rail 4. The top end of the second telescopic rod 312 and the top end of the auxiliary rod 32 are both hinged and fixed with the support plate 2.

Referring to fig. 3, first telescopic link 311 and second telescopic link 312 all include pipe sleeve 3111 and ejector pin 3112, and pipe sleeve 3111 is vertical to be set up, pipe sleeve 3111 bottom and base 1 fixed connection, are provided with pneumatic cylinder 3113 in pipe sleeve 3111, and the bottom and the base 1 of pneumatic cylinder 3113 are fixed, the top and ejector pin 3112 fixed connection of the hydraulic stem of pneumatic cylinder 3113, the vertical setting of ejector pin 3112, the top of ejector pin 3112 and the bottom of backup pad 2 are articulated fixed. The diameter of the push rod 3112 is smaller than the inner diameter of the pipe sleeve 3111, and when the hydraulic rod extends to the shortest length, the push rod 3112 is partially located in the pipe sleeve 3111. Through the setting of pipe box 3111, realize the protection to pneumatic cylinder 3113. The hydraulic cylinder 3113 is started, and the ram 3112 is pushed up by the hydraulic rod of the hydraulic cylinder 3113, so that the telescopic rod is extended. The second expansion link 312 is extended to raise the end hinged to the support plate 2, so that the auxiliary rod 32 is extended.

Referring to fig. 4, the auxiliary rod 32 includes an auxiliary tube 321 and an auxiliary strut 322, the auxiliary tube 321 is vertically disposed, the bottom end of the auxiliary tube 321 is slidably connected to the base 1, the top end of the auxiliary tube 321 is open and slidably connected to the auxiliary strut 322 in the auxiliary tube 321, and the top end of the auxiliary strut 322 is hinged to the supporting plate 2. A locking member is provided on the auxiliary rod 32, the locking member includes a bolt 323, and the bolt 323 penetrates through the sidewall of the auxiliary pipe 321 to abut against the sidewall of the auxiliary rod 322, thereby fixing the auxiliary pipe 321 and the auxiliary rod 322.

The extension of the second telescopic rod 312 is adjusted to match with one end of the supporting plate 2 hinged and fixed to the top end of the first telescopic rod 311, so that one end of the supporting plate 2 hinged to the top end of the second telescopic rod 312 is lifted, and meanwhile, the auxiliary rod 32 hinged and fixed to the supporting plate 2 is driven to extend along with the lifting of the supporting plate 2 and one end of the second telescopic rod 312 hinged. As the second telescopic rod 312 and the auxiliary rod 32 extend, one end of the hinged support plate 2 is lifted, so that the second telescopic rod 312 and the auxiliary rod 32 slide along the length direction of the slide rail 4.

Referring to fig. 1 and 5, a pulling member 5 is disposed between one end of the slide rail 4 facing the first telescopic rod 311 and the opposite second telescopic rod 312, and the pulling member 5 drives the second telescopic rod 312 and the auxiliary rod 32 to slide along the length direction of the slide rail 4 toward the direction close to the first telescopic rod 311, so that the second telescopic rod 312 and the auxiliary rod 32 jack the support plate 2. The pulling member 5 includes a tension spring 51, two ends of the tension spring 51 in the length direction are respectively and fixedly connected with a fixing hook 52, a fixing ring 3121 is fixedly connected to the position of the fixing hook 52 opposite to the slide rail 4 and the side wall of the fixing hook 52 opposite to the pipe sleeve 3111 of the second telescopic rod 312, and the fixing hook 52 is hooked on the fixing ring 3121, so that the tension spring 51 is conveniently and rapidly detached and fixed. When the supporting plate 2 is in the horizontal state, the extension spring 51 is in the stretched state, so that the supporting plate 2 is jacked up by extending the telescopic rod when the hydraulic cylinder 3113 is started, and the supporting plate 2 is jacked up better by matching with the arrangement of the sliding part and the extension spring 51.

The length of the first telescopic rod 311 is adjusted, and the synchronous extension of the second telescopic rod 312 and the auxiliary rod 32 enables the supporting plate 2 to gradually incline around the position hinged to the first telescopic rod 311 as a hinge point to adapt to the roofs to be repaired with different inclination degrees, so that the supporting plate 2 is attached to the roofs to support the roofs.

Example 2:

referring to fig. 6, embodiment 2 differs from embodiment 1 in that: first telescopic link 311 and second telescopic link 312 are located base 1 length direction's both ends respectively, and first telescopic link 311 and second telescopic link 312 all are located base 1 width direction's axis, use base 1 width direction's axis as the symmetry axis be provided with respectively in the both sides of second telescopic link 312 with base 1 sliding connection's auxiliary rod 32, be in on the axis with base 1 width direction through first telescopic link 311 and second telescopic link 312, auxiliary rod 32 is located the both sides of second telescopic link 312, thereby be convenient for more firm backup pad 2.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a support is restoreed to ancient building wall body, includes rectangle base (1) and backup pad (2), and base (1) level sets up, is provided with flexible subassembly (3) between base (1) and backup pad (2), at four right-angled position fixedly connected with universal wheel (11) of base (1) lower surface, its characterized in that: the telescopic component (3) comprises a telescopic rod (31) and an auxiliary rod (32), the telescopic rod (31) comprises a first telescopic rod (311) and a second telescopic rod (312), the first telescopic rod (311) and the second telescopic rod (312) are respectively positioned at two ends of the base (1) in the length direction, the auxiliary rod (32) and the second telescopic rod (312) are positioned at the same side of the base (1) in the length direction, the bottom end of the first telescopic rod (311) is fixedly connected with the base (1), the top end of the first telescopic rod (311) is hinged and fixed with the support plate (2), the bottom ends of the second telescopic rod (312) and the auxiliary rod (32) are both in sliding connection with the base (1), a sliding rail (4) is fixed at the bottom end of the second telescopic rod (312) and at the position opposite to the bottom end of the auxiliary rod (32) on the base (1), the length direction of the sliding rail (4) is arranged along the length direction of the base (1), the bottom ends of the second telescopic rod (312), thereby be convenient for drive second telescopic link (312) and auxiliary rod (32) through the slider and slide along corresponding slide rail (4), second telescopic link (312) and auxiliary rod (32) top all with backup pad (2) lower surface articulated fixed.

2. The historic building wall repair support according to claim 1, wherein: first telescopic link (311) and second telescopic link (312) all include pipe box (3111) and ejector pin (3112), pipe box (3111) vertical setting, pipe box (3111) bottom and base (1) fixed connection, be provided with pneumatic cylinder (3113) in pipe box (3111), the bottom and base (1) of pneumatic cylinder (3113) are fixed, the top and ejector pin (3112) fixed connection of the hydraulic stem of pneumatic cylinder (3113), the vertical setting of ejector pin (3112), the top of ejector pin (3112) is articulated fixed with the bottom of backup pad (2), the diameter of ejector pin (3112) is less than the internal diameter of pipe box (3111), when the hydraulic stem stretches out shortest length, ejector pin (3112) partial length is located pipe box (3111).

3. The historic building wall repair support according to claim 1, wherein: auxiliary rod (32) are including auxiliary tube (321) and auxiliary branch pole (322), and auxiliary tube (321) is vertical to be set up, and auxiliary tube (321) bottom and base (1) sliding connection, auxiliary tube (321) top opening, in auxiliary tube (321) with auxiliary branch pole (322) sliding connection, auxiliary branch pole (322) top is articulated fixed with backup pad (2), is provided with the retaining member on auxiliary rod (32).

4. The historic building wall repair support according to claim 1, wherein: the connecting line between the first telescopic rod (311), the second telescopic rod (312) and the auxiliary rod (32) is enclosed to form an isosceles triangle, and the distance between the first telescopic rod (311) and the second telescopic rod (312) is equal to the distance between the second telescopic rod (312) and the auxiliary rod (32).

5. The historic building wall repair support according to claim 1, wherein: the first telescopic rod (311) and the second telescopic rod (312) are located at two ends of the base (1) in the length direction respectively, the first telescopic rod (311) and the second telescopic rod (312) are located on a central axis of the base (1) in the width direction, and auxiliary rods (32) which are connected with the base (1) in a sliding mode are arranged on two sides of the second telescopic rod (312) respectively by taking the central axis of the base (1) in the width direction as a symmetry axis.

6. The historic building wall repair support according to claim 1, wherein: the sliding part is a pulley (33).

7. The bracket for repairing the ancient building wall according to claim 2, wherein: a pulling piece (5) is arranged between one end, facing the first telescopic rod (311), of the sliding rail (4) and the opposite second telescopic rod (312), and two ends of the pulling piece (5) in the length direction are fixedly connected with the position, opposite to the sliding rail (4), of the sliding rail and the side wall, opposite to the pipe sleeve (3111) of the second telescopic rod (312), of the sliding rail.

8. The bracket for repairing ancient building wall according to claim 7, wherein: the pulling piece (5) comprises a tension spring (51), two ends of the tension spring (51) in the length direction are fixedly connected with fixing hooks (52) respectively, fixing rings (3121) are fixedly connected to the positions of the fixing hooks (52) opposite to the sliding rail (4) and the side walls of the fixing hooks (52) opposite to the pipe sleeves (3111) of the second telescopic rods (312), and the fixing hooks (52) are hooked on the fixing rings (3121).

9. The historic building wall repair support according to claim 1, wherein: four right angles departments of base (1) lower surface all are provided with stabilizer blade (12), stabilizer blade (12) are including pillar (121) and thread bush (122), thread bush (122) vertical setting, thread bush (122) top and base (1) lower surface fixed connection, thread bush (122) bottom is the opening, the internal thread has been seted up in thread bush (122), pillar (121) and thread bush (122) threaded connection, pillar (121) vertical setting, the one end that base (1) was kept away from in pillar (121) is the tip.

10. The bracket for repairing ancient building walls according to claim 3, wherein: the locking piece comprises a bolt (323), and the bolt (323) penetrates through the side wall of the auxiliary pipe (321) and is abutted to the side wall of the auxiliary supporting rod (322).